digispark-with-cable: wip progress

[reprap-play.git] / digispark-with-cable.scad

diff --git a/digispark-with-cable.scad b/digispark-with-cable.scad
index 617abea4f2c6a50abc69b16567d8457b82c1b6d1..a2b32998347e3be6cda2461516847243b9849f4f 100644 (file)
--- a/digispark-with-cable.scad
+++ b/digispark-with-cable.scad
@@ -41,6 +41,10 @@ strain_pitch_along = 10;
 strain_groove_d = 2;
 strain_groove_w = 3;
 
+cover_strap_c_d_y = 5.5; // from front of board
+cover_registration_sz_y = 2;
+cover_registration_sz_z = 3;
+
 cable_space_z = 6;
 cable_dia = 5;
 bottom_floor_th = 1.5;
@@ -51,8 +55,13 @@ side_x_gap = 0.5;
 
 cover_ceil_th = 0.9;
 
+cover_strap_sz_x = side_wall_th * 3.5;
+
 // calculated
 
+strap_w = strain_w;
+cover_strap_cutout_z = side_wall_th;
+
 top_top_z = usb_wall_h;
 top_base_z = -board_th;
 bottom_base_z = top_base_z - cable_space_z - bottom_floor_th;;
@@ -71,13 +80,40 @@ cover_top_z  = top_top_z + cover_ceil_th;
 top_side_wall_x = +board_w/2 + side_wall_th;
 total_side_wall_x = top_side_wall_x + side_wall_th + side_x_gap;
 
+cover_registration_c_dy = -cover_strap_c_d_y - strap_w/2
+  - side_wall_th - cover_registration_sz_y/2;
+
 module BothSides(){
   for (m=[0,1]) {
-    mirror([m,0]) {
+    mirror([m,0,0]) {
       children();
     }
   }
 }
+
+module NormalStrapCutouts(y_c, z, rot){
+  BothSides(){
+    translate([ -total_side_wall_x, y_c, z ])
+      rotate([0, rot, 0])
+      cube([ side_wall_th,
+            strap_w,
+            10 ],
+          center=true);
+  }
+}
+module BottomStrapCutouts(y_c){
+  NormalStrapCutouts(y_c, bottom_base_z, -45);
+}
+module CoverStrapCutouts(){
+  BothSides(){
+    translate([ -total_side_wall_x, -cover_strap_c_d_y, cover_top_z ])
+      cube([ cover_strap_sz_x*2,
+            strap_w,
+            cover_strap_cutout_z*2 ],
+          center=true);
+  }
+}
+
 module FrontWallsPlan(slop) {
   BothSides(){
     rectfromto([ -board_w/2 - side_wall_th,    0             ],
@@ -117,6 +153,21 @@ module TopMainWallsPlan() {
             [ +board_w/2 + side_wall_th,            total_y_min ]);
 }
 
+module CoverRegistrations(){
+  linextr_y_xz(cover_registration_c_dy - strap_w/2,
+              cover_registration_c_dy + strap_w/2) {
+    difference(){
+      rectfromto([ -total_side_wall_x,
+                         cover_wall_bot_z - cover_registration_sz_z  ],
+                [ +total_side_wall_x, cover_top_z ]);
+      hull(){
+       TopElevationForCutout();
+       translate([0, -20]) TopElevationForCutout();
+      }
+    }
+  }
+}
+
 module Top(){ ////toplevel
   difference(){
     union(){
@@ -180,6 +231,11 @@ module Bottom(){ ////toplevel
        }
       }
     }
+    minkowski(){
+      CoverRegistrations();
+      cube([ 1, fit_gap_y*2, fit_gap_z*2 ], center=true);
+    }
+    BottomStrapCutouts(-cover_strap_c_d_y);
   }
 }
 
@@ -192,8 +248,14 @@ module CoverMainElevation(){
   }
 }
 module Cover(){ ////toplevel
-  linextr_y_xz(main_y_min, front_y_max)
-    CoverMainElevation();
+  difference(){
+    union(){
+      linextr_y_xz(main_y_min, front_y_max)
+       CoverMainElevation();
+      CoverRegistrations();
+    }
+    CoverStrapCutouts();
+  }
 }
 
 module BottomDemo(){ ////toplevel